Invoking the laws of war with reference to Portland doesn't make any sense unless you really believe that Antifa and BLM fall under the category of enemy combat

Invoking the laws of war with reference to Portland doesn't make any sense unless you really believe that Antifa and BLM fall under the category of enemy combatants, which would mean that the government funded and backed forces were authorized to shoot them on sight. It's not because there is tear gas that police are sent to disperse crowds. Without tear gas, they'd use some other non-lethal implement authorized for that purpose. Authorizing non-lethal force to disperse crowds is not holding police to a lower moral standard than that to which the military is held. In fact, the military has the same kind of authorizations for dealing with (a) rebellious troops in its own ranks, (b) prisoners of war and (c) civilians in occupied territory. That is why the DoD does research on these incapacitating weapons. It's military forces that are held to police standards when these weapons are used, not the other way around.